import re
L = ['1759@1@83@0#1362@0.2600@25.7400@2.8600#1094@1@129.6@14.4',
'1356@0.4950@26.7300@2.9700',
'1354@1.78@35.244@3.916#1101@2@40@0#1108@2@30@0',
'1430@1@19.35@2.15#1431@3@245.62@60.29#1074@12@385.2@58.8#1109',
'1809@8@75.34@292.66#1816@4@24.56@95.44#1076@47@510.89@1110.61']
pat = r'(?<![^#])\d{4}(?![^@])'
out = [re.findall(pat, x) for x in L]
print (out)
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
[['1759', '1362', '1094'], ['1356'], ['1354', '1101', '1108'], ['1430', '1431', '1074', '1109'], ['1809', '1816', '1076']]